JPH10141431A - Method and structure for fixing dynamic damper to engine mount bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fit a dynamic damper easily without generating the characteristic change of an elastic body by fixing the dynamic damper by driving out to a plate from the inner peripheral side of an engine mounting bracket to fix the dynamic damper. SOLUTION: A dynamic damper 20 with a weight 32 fitted to a plate 24 through an elastic body 28 is fitted to a cylindrical engine mounting bracket 10. The damper 20 is positioned in a specified position on the periphery of the bracket 10, and the plate 24 is stuck closely thereto. In this state, protrusions are driven out by a punch in different diameters with the center of a pipe part 13 as an origin, toward a plurality of specified positions of fitting parts 27 of the plate 24 from the inner peripheral side of the bracket 10. A plurality of protruding parts 11 are therefore formed at the bracket 10, and a plurality of opening parts 25 are formed at the fitting parts 27. Since the protruding parts 11 are protruded from the opening parts 25 different in direction, the damper 20 can be fixed to the bracket 13 without coming off the pipe part 13 whichever direction force is applied to the damper 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and a structure for fixing a dynamic damper to an engine mount bracket.

[0002]

2. Description of the Related Art In vehicles such as automobiles, anti-vibration measures have been taken in engine mounts in order to prevent transmission of engine vibration to the vehicle body and to reduce noise caused by vehicle vibration. It has been subjected. Specifically, the engine is elastically supported via rubber or the like in the engine mount bracket to reduce the transmission of vibration from the engine to the engine mount, and a dynamic damper is attached to the engine mount bracket. It has been practiced to prevent vibration in a specific frequency range.

FIG. 5 shows an engine mount bracket 10 to which a dynamic damper 20 is attached. Bracket 10 fixed to the vehicle body with bolts
Is provided with a dynamic damper 20 composed of a weight 32 and a rubber elastic body 28 on its outer periphery. The dynamic damper 20 is attached to the bracket 10 by directly bonding the rubber elastic body 28 to the outer surface of the bracket 10 by vulcanization.

As shown in FIG. 5, an engine mount bracket 10 having a dynamic damper 20 is provided.
In order to form the rubber elastic body 28, the bracket 10
Need to be directly vulcanized. In this case, if the size of the bracket 10 becomes large, the vulcanization mold for vulcanization adhesion must be made large accordingly, which causes a problem that the cost is increased.

[0005] Further, the bracket 10 needs to be coated for rust prevention. If this coating is performed after the rubber elastic body 28 is vulcanized and bonded, the rubber elastic body 28 may change its characteristics due to the high temperature at the time of coating. In order to avoid this, there was an inconvenience that only the dipping coating at a low drying temperature could be performed. Conversely, when rust-proof coating is performed before vulcanization bonding, vulcanization bonding must be performed after the coating of the bonding portion of the bracket 10 is peeled off, which causes a problem of an increase in man-hours.

Therefore, an engine mount bracket 10 having a dynamic damper 20 having the structure shown in FIG. 6 is used. In this case, the rubber elastic body 2
8 is not directly attached to the bracket 10, but a metal plate 24 is attached to the rubber elastic body 28 by vulcanization to form the dynamic damper 20, and the plate 24 is attached to the bracket 10 by arc welding or resistance welding (spot welding). , Projection welding, etc.), the dynamic damper 20 is attached to the bracket 10.

In this case, there is an advantage that a vulcanizing mold according to the size of the bracket 10 is not required. However, it is necessary to peel off the coating for rust prevention for energization such as arc welding and then repaint the coating, which has the problem of increasing the number of steps as in the case of FIG.

Further, the welding of the plate 24 is performed by the rubber elastic body 2.
Since the heat treatment is performed after the vulcanization bonding of No. 8, the heat generated by welding adversely affects the rubber elastic body 28 and the rubber bonding, and there is a possibility that the rubber elastic body 28 may have a change in hardness or a decrease in adhesive strength. Further, there is a problem that the time required for the attachment by welding is relatively long.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to mount a dynamic damper to a bracket for engine mounting.
A method of fixing the damper to the engine mount that eliminates the possibility of the elastic body used in the dynamic damper changing its characteristics, eliminating the need for stripping and restoring rust-preventive paint and reducing the man-hour required for installation. And to provide a fixed structure.

[0010]

According to a first aspect of the present invention, there is provided a method of fixing a dynamic damper to an engine mount bracket according to the first aspect of the present invention, wherein a weight is attached to a plate via an elastic body. A method of fixing a dynamic damper to a cylindrical engine mount bracket, a positioning step of positioning the dynamic damper by bringing the plate into close contact with a predetermined position on an outer periphery of the engine mount bracket,
In the state where the dynamic damper is positioned on the engine mount bracket by the positioning step, the engine mount is punched in different directions from the inner peripheral side of the engine mount bracket toward a plurality of predetermined positions of the plate. Fitting the bracket and the plate to fix the dynamic damper.

According to the first aspect of the present invention, the dynamic damper formed by attaching a weight to the plate via the elastic body is fixed by punching the plate from the inner peripheral side of the engine mount bracket. Therefore, unlike the case where the elastic body is fixed by welding or the like, high heat is not applied to the elastic body at the time of fixing, so that even if the elastic body is formed of rubber or the like, no change in characteristics occurs.

Further, since this fixing is not performed by welding, it is not necessary to peel off the paint in advance to obtain conductivity for welding and then repaint the paint, and to attach the dynamic damper to the engine mount bracket. Can be made more efficient.

According to a second aspect of the present invention, there is provided a method for fixing a dynamic damper to an engine mount bracket.
2. The dynamic damper fixing step according to claim 1, wherein a plurality of protrusions are formed on the engine mount bracket by punching from the inner peripheral side of the engine mount bracket toward a plurality of predetermined positions on the plate. The engine mount bracket and the plate are fitted to each other to form a plurality of openings through which the projection penetrates, thereby fixing the dynamic damper.

According to the second aspect of the present invention, a plurality of protrusions are formed on the engine mount bracket by punching from the inner peripheral side of the engine mount bracket toward a plurality of predetermined positions on the plate, and at the same time, the plate is formed on the plate. The dynamic damper is fixed by forming a plurality of openings through which the projections penetrate. Since the method of fixing the dynamic damper is a method of fixing by stamping, it has the same operation and effect as the fixing method of the first aspect.

In particular, not only can the projection of the engine mount bracket and the opening of the plate of the dynamic damper be formed simultaneously, but they can also be fitted together, so that the dynamic damper can be attached to the engine mount bracket in a small number of steps. It can be fixed, and efficiency can be improved.

According to a third aspect of the present invention, there is provided a method of fixing a dynamic damper to an engine mount bracket.
2. The dynamic damper fixing step according to claim 1, wherein a plurality of protrusions are formed on the engine mount bracket by punching from the inner peripheral side of the engine mount bracket toward a plurality of predetermined positions of the plate, and the plate is simultaneously formed. The engine mount bracket and the plate are fitted to each other by forming a plurality of projections having a hollow portion into which the projections are fitted, thereby fixing the dynamic damper.

According to the third aspect of the present invention, a plurality of projections are formed on the engine mount bracket by punching from the inner peripheral side of the engine mount bracket toward a plurality of predetermined positions on the plate, and at the same time, each plate is formed on the plate. The dynamic damper is fixed by forming a plurality of protrusions having a hollow portion into which the protrusions fit. Since the method of fixing the dynamic damper is a method of fixing by stamping, it has the same operation and effect as the fixing method of the first aspect.

In particular, not only can the projection of the engine mount bracket and the projection of the plate of the dynamic damper be formed at the same time, they can also be fitted together, so that the dynamic damper can be attached to the engine mount bracket in a small number of steps. It can be fixed, and efficiency can be improved.

Further, according to the present invention, since fragments generated by shearing the plate are not generated, man-hours required for the treatment can be reduced.

According to a fourth aspect of the present invention, there is provided a method for fixing a dynamic damper to an engine mount bracket.
2. The dynamic damper plate according to claim 1, wherein the plate of the dynamic damper has a plurality of openings formed in advance, and in the dynamic damper fixing step, a plurality of plates formed in advance on the plate from the inner peripheral side of the engine mount bracket. A plurality of projections are formed on the engine mount bracket by punching out toward the opening, whereby the engine mount bracket and the plate are fitted to fix the dynamic damper.

According to the fourth aspect of the present invention, a plurality of protrusions are formed on the engine mount bracket by punching the plurality of openings formed in advance on the plate to fix the dynamic damper. Since the method of fixing the dynamic damper is a method of fixing by stamping, it has the same operation and effect as the fixing method of the first aspect.
In particular, since the projection of the engine mount bracket can be formed and the projection can be fitted to the opening of the plate at the same time, the dynamic damper can be fixed to the engine mount bracket in a small number of steps, thereby improving efficiency. Can be.

Further, since the openings are formed in advance and are always present, the fitting of the projections to the projections does not become incomplete due to the formation of the incomplete openings, and the projections and the openings are securely fitted. Can be combined.

According to a fifth aspect of the present invention, there is provided a method of fixing a dynamic damper to an engine mount bracket.
5. The dynamic damper fixing step according to claim 2, wherein in the dynamic damper fixing step, in different directions radially extending in a circumferential direction of the engine mount bracket from an inner peripheral side of the engine mount bracket toward a plurality of predetermined positions of the plate. Forming a plurality of projections on the engine mount bracket.

According to the fifth aspect of the present invention, the engine is mounted in different directions radially in the circumferential direction of the engine mount bracket from the inner peripheral side of the engine mount bracket toward a plurality of predetermined positions on the plate. The dynamic damper is fixed by forming a plurality of projections on the mount bracket and simultaneously forming a plurality of openings through the projections on the plate. Since the method of fixing the dynamic damper is a method of fixing by stamping, it has the same operation and effect as the fixing method of the first aspect. In addition, the dynamic damper can be securely fixed because the radial direction of the engine mount bracket is different from the inner circumferential side of the engine mount bracket toward the plurality of predetermined positions of the plate.

A sixth aspect of the present invention defines a structure for fixing a dynamic damper to an engine mount bracket obtained by the method for fixing a dynamic damper to an engine mount bracket according to the second, fourth, or fifth aspect. I have. Accordingly, the fixing structure does not require welding, and the dynamic damper having the same operation and effect as the second aspect of the present invention is fixed to the engine mount bracket.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below more specifically with reference to the drawings.
For convenience of explanation, the following description will be divided into a structure for attaching the dynamic damper to the engine mount bracket and a method for attaching the dynamic damper to the engine mount bracket.

<Attachment Structure of Dynamic Damper to Engine Mount Bracket> FIG. 1 is a partial perspective view showing a state where the dynamic damper 20 is attached to the engine mount bracket 10.

Although the inside of the engine mount bracket 10 is not shown in this figure, the engine mount bracket 10 generally includes a leg portion 12 and a pipe portion 13 as shown in FIG. And is configured not to transmit vibration from the engine to the vehicle body by elastically supporting the engine through an anti-vibration rubber member or a fluid-filled structure provided inside the pipe portion 13. .

A dynamic damper 20 is provided on the outer periphery of the engine mount bracket 10 to reduce vibration at a specific frequency. The dynamic damper 20 is formed between the weight 32 and the plate 24 with an elastic body such as a rubber elastic body 28 interposed therebetween. That is, the rubber elastic body 28 is vulcanized and bonded between each of the weight 32 and the plate 24,
It is integrally formed as a dynamic damper 20 including a weight 32, a rubber elastic body 28, and a plate 24.

The fixing between the dynamic damper 20 and the engine mount bracket 10 is performed, as shown in FIG.
A plurality of protrusions 11 protruding from the outer periphery of the pipe portion 13 in different radial directions with the center of the pipe portion 13 as the origin are formed on the periphery of the plate 24 of the dynamic damper 20, that is, on the mounting portion 27 which is a portion protruding from the rubber elastic body 28. It is performed by fitting into a plurality of openings 25 formed.

Since these projections 11 project in different radial directions with the center of the pipe 13 as the origin, once these projections 11 are fitted into the corresponding openings 25, the dynamic damper 20 is engaged. Is not detached from the pipe portion 13 of the engine mount bracket 10 when a force is applied in any direction.

As described above, according to this embodiment, the engine mount bracket 1 is used to obtain conductivity during welding.
Because there is no need to remove the paint on the 0 and plate 24,
Thereafter, the dynamic damper 20 can be efficiently attached to the engine mount bracket 10 without repainting.

The dynamic damper 20 is fixed to the engine mount bracket 10 by fitting the projection 11 of the engine mount bracket 10 into the opening of the dynamic damper 20, so that the dynamic damper 20 is fixed by welding. High heat is not applied to the elastic body. Therefore, even when the elastic body 28 is formed of rubber or the like, a change in hardness due to heat and a decrease in adhesive strength do not occur.

<Method of Attaching Dynamic Damper to Engine Mount Bracket> Next, the aforementioned dynamic damper 20 formed by attaching the weight 32 to the plate 24 via the elastic body 28 is attached to the cylindrical engine mount bracket 10. The method will be described.

In this mounting, first, the dynamic damper 20 is positioned at a predetermined position on the outer periphery of the engine mount bracket 10, for example, at the mounting position shown in FIG.

With the dynamic damper 20 positioned on the engine mount bracket 10 as described above, as shown in a schematic sectional view of FIG.
The plurality of mounting portions 27 are punched toward the plurality of predetermined positions by the punch 40 in radial directions different from the center of the pipe portion 13 as the origin.

Thus, a plurality of projections 11 are formed on the engine mount bracket 10 and, at the same time, a plurality of openings 25 through which these projections 11 penetrate are formed on the mounting portion 27 of the plate 24. In addition, since the projections 11 project in different directions, the projections 11 do not come off from the pipe 13 of the engine mount bracket 10 when a force is applied to the dynamic damper 20 in any direction. Therefore, these projections 11 and openings 25
The dynamic damper 20 is fixed to the engine mount bracket 10.

FIGS. 3 (A) and 3 (B) are views showing the details of this punching. FIG. 3 (A) shows the dynamic damper 20 from a predetermined position on the inner peripheral side of the pipe portion 13 of the engine mount bracket 10. Mounting portion 27 of plate 24
Shows a state immediately before the punch 40 is launched toward. At this time, on the mounting portion 27 of the plate 24 on the side opposite to the side facing the engine mount bracket 10, the die 42 is held in a state in which it is in close contact with the position corresponding to the punch 40.

Then, as shown in FIG. 3B, when the punch 40 is driven toward the die 42 via the engine mount bracket 10 and the plate 24, a projection 11 is formed on the engine mount bracket 10. The mounting portion 27 of the plate 24 is sheared between the engine mount bracket 10 punched by the punch 40 and the die 42 to form the opening 25. FIG. 3B shows a state where the pieces 26 of the punched plate 24 remain in the die 42. Also,
As shown in this figure, in this state, the protruding portion 11 formed on the engine mount bracket 10 is in a state of being fitted into the opening 25 formed on the mounting portion 27 of the plate 24.

As described above, according to the method of fixing the dynamic damper 20 to the engine mount bracket 10 according to the present embodiment, the dynamic damper 2 formed by attaching the weight 32 to the plate 24 via the elastic body 28 is provided.
0 is the pipe portion 13 of the engine mount bracket 10
Is fixed by punching the plate 24 into the mounting portion 27 from the inner peripheral side. Therefore, unlike the case of fixing by welding or the like, since high heat is not applied to the elastic body 28, even when the elastic body 28 is formed of rubber or the like, there is no change in characteristics.

Further, since this fixing is not performed by welding, it is not necessary to peel off the paint in advance to obtain the conductivity for welding and then to repaint the paint. Can be mounted more efficiently.

In addition, since the dynamic damper 20 is fixed on the engine mount bracket 10, the projection 11 and the opening 25 can be simultaneously fitted to each other at the same time as the formation of the projection 11 and the opening 25. Damper 20 to engine mount bracket 1
It can be fixed to zero, and the efficiency of mounting can be improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various kinds of embodiments can be made within the scope of the present invention or within the equivalent scope of the claims. Modifications are possible.

For example, in the above-described embodiment, the projections 11 facing different directions are attached to the engine mount bracket 10.
2 is provided on the outer periphery of the pipe portion 13, and two openings 25 in which they are fitted are provided in the mounting portion 27 of the plate 24 of the dynamic damper 20. You may make it provide three or more projection parts 11 and the opening part 25 in which they fit, respectively.

Further, in the above embodiment, the plate 24 of the dynamic damper 20 is brought into close contact with the outer periphery of the pipe portion 13 of the engine mount bracket 10, and is directed from the inner periphery of the pipe portion 13 of the engine mount bracket 10 toward the plate 24. The example in which the protrusion 11 is formed on the pipe portion 13 of the engine mount bracket 10 by punching and the opening 25 is formed at a corresponding position of the plate 24 is shown. However, even in the case of similar punching, by changing the relationship between the diameter of the punch 40 and the diameter of the die 42, as shown in FIG. Projections 55 are also formed at corresponding positions on the plate 24 of the engine 20, and the projections 11 formed on the engine mount bracket 10 are fitted into the hollow portions 56 of the projections 55 formed on the plate 24 of the dynamic damper 20. So that the dynamic damper 20
Can be fixed on the engine mount bracket 10.

In this case, the same operation and effect as those of the above-described embodiment are obtained. However, in this method, since the plate 24 is not sheared to generate the fragments 26 as in the above-described embodiment, the processing is performed. The man-hours required for can be reduced.

Further, in the above embodiment, the opening 25 is formed in the plate 24 of the dynamic damper 20 by punching which is performed simultaneously with the punching of the pipe portion 13 of the engine mount bracket 10. However, the plate 24 of the dynamic damper 20 is formed. A plurality of openings 25 in advance.
The projections 11 are formed by punching out the engine mount brackets 10 in directions different from each other at positions corresponding to the openings 25, so that the projections 11 are fitted into the openings 25. Thus, the dynamic damper 20 can be fixed to the engine mount bracket 10. This method also has the same operation and effect as the above-described embodiment.

In particular, according to this method, since the opening is formed in advance and always exists, the projection 11 and the opening 2 are formed.
5 can be securely fitted.

In each of the above-described embodiments, the radial direction from the center of the pipe portion 13 to the plurality of predetermined positions of the mounting portion 27 of the plate 24 from the inner peripheral side of the pipe portion 13 of the engine mount bracket 10 is defined. An example is shown in which the projections 11 are formed on the engine mount bracket 10 by punching in different directions, and the dynamic damper 20 is fixed to the engine mount bracket 10 by fitting the projections 11 with the opening 25 of the dynamic damper 20. However, the plurality of protrusions 11 of the engine mount bracket 10 may be formed in different directions from each other. Even if the plurality of protrusions 11 are not necessarily projected in different radial directions with the origin of the center of the pipe portion 13, the dynamic damper 20 can be mounted on the engine. It can be fixed to the mount bracket 10 reliably.

[0050]

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing a state where a dynamic damper is attached to an engine mount bracket.

FIG. 2 is a schematic cross-sectional view showing a state in which the punch is punched from an inner peripheral side of a pipe portion of an engine mount bracket toward a predetermined position of a plate.

FIGS. 3 (A) and 3 (B) are cross-sectional views for explaining launching from an engine mount bracket toward a plate of a dynamic damper.

FIG. 4 is a cross-sectional view showing a modified example of launching from an engine mount bracket toward a plate of a dynamic damper.

FIG. 5 is a diagram showing a conventional example of an engine mount bracket to which a dynamic damper is attached.

FIG. 6 is a diagram showing another conventional example of an engine mount bracket to which a dynamic damper is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Engine mount bracket 11 Projection part 20 Dynamic damper 24 Plate 25 Opening part 28 Elastic body 32 Weight 55 Projection part 56 Hollow part

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor, Naomi Mioka, No. 10, Michigami, Wakaai-cho, Toyota-shi, Aichi Prefecture Inside Toyo Brake Industry Co., Ltd. Street address Toyosei Brake Industry Co., Ltd.

Claims (6)

[Claims] 1. A method of fixing a dynamic damper formed by attaching a weight to a plate via an elastic body to a cylindrical engine mount bracket, wherein the plate is brought into close contact with a predetermined position on an outer periphery of the engine mount bracket. A positioning step of positioning the dynamic damper, and in a state in which the dynamic damper is positioned on the engine mount bracket by the positioning step, a plurality of predetermined positions on the plate from an inner peripheral side of the engine mount bracket. Fixing the dynamic damper by fitting the engine mount bracket and the plate by punching in different directions toward the engine mount bracket. Fixing method. 2. The engine mount bracket according to claim 1, wherein, in the dynamic damper fixing step, a plurality of protrusions are formed on the engine mount bracket by punching from an inner peripheral side of the engine mount bracket toward a plurality of predetermined positions of the plate. An engine mount bracket for a dynamic damper, wherein a plurality of openings through which the projections penetrate are formed at the same time as the formation, whereby the engine mount bracket and the plate are fitted to fix the dynamic damper. How to fix to. 3. The engine mount bracket according to claim 1, wherein, in the dynamic damper fixing step, a plurality of protrusions are formed on the engine mount bracket by punching from an inner peripheral side of the engine mount bracket toward a plurality of predetermined positions on the plate. At the same time, a plurality of projections having a hollow portion in which the projections are fitted are formed on the plate to fit the engine mount bracket and the plate to fix the dynamic damper. How to fix the dynamic damper to the engine mount bracket. 4. The dynamic damper plate according to claim 1, wherein the plate of the dynamic damper has a plurality of openings formed in advance, and in the dynamic damper fixing step, the plate is preliminarily attached to the plate from the inner peripheral side of the engine mount bracket. By launching towards the formed openings,
A method of fixing a dynamic damper to an engine mount bracket, comprising: forming a plurality of protrusions on the engine mount bracket to fit the engine mount bracket and the plate to each other to fix a dynamic damper. 5. The dynamic damper fixing step according to claim 2, wherein in the step of fixing the dynamic damper, the circumference of the engine mount bracket is moved from an inner peripheral side of the engine mount bracket to a plurality of predetermined positions of the plate. A method of fixing a dynamic damper to an engine mount bracket, wherein a plurality of protrusions are formed on the engine mount bracket by punching in different directions radially in the direction. 6. A structure for fixing a dynamic damper to an engine mount bracket, comprising: a plurality of protrusions projecting from an outer periphery in different directions from an outer periphery; A dynamic damper formed by attaching a weight, wherein the plate has a plurality of openings at positions corresponding to the protrusions of the engine mount bracket, and the plurality of protrusions of the engine mount bracket and the plate A structure for fixing a dynamic damper to an engine mount bracket, wherein the dynamic damper is fixed to the engine mount bracket in a state where the plurality of openings are fitted to each other.